I am about 6ft and 230lb, and I have had no problems making friends or meeting women during my time here in Taiwan. Really depends on her interests. Some ladies like tall and thin, some like bigger guys. I have been openly praised and criticized for my physical size, from “I feel very safe and warm with you” to “you’re fat, have you thought about going on a diet?” Again, all depends on the lady.
I find that I get more questions about my job and salary than other topics. Also, speaking Chinese is a big plus, and will overcome other “negatives” you might have. I agree with Tomas too, having a personality and being able to let them feel comfortable and letting them laugh goes a long way. I think these qualities will help you go from average to “he’s special” very quickly.
Also, really depends on where you meet them at. If you go to some of the late night meat markets expect to be judged more on your looks. But if you meet people under more normal circumstances than speaking Chinese and being able to carry on a conversation goes a long way. Also, I have found that several ladies simply liked the fact that I treated them with politeness and courtesy, and was not reeking of the “hunt.”
Some Taiwanese women, even though they like Western guys, don’t want to feel like they are being hunted or are the next conquest on your Asian tour. Also, try to meet women that have friends, and focus on being friends with all the ladies. You will find that very quickly you have a lot of friends, and they start to like and trust you. I have been adopted by groups of ladies on several occasions and taken to other bars, early morning breakfast (3am) or to KTV with them, and it was a lot of fun. That’s when they start bringing along new friends of theirs that are interested in foreigners and you get the chance to meet some very nice ladies that you would feel comfortable taking home to meet the parents.